B. Correct. Suppose that the flies that did not avoid the odor when tested individually were more likely to avoid the odor when in groups. This may be simply because these flies were following the movements of the flies that were triggered. That is, the signal did not cause the other flies' reactions. Instead, the movements of the triggered flies did. It follows that this possibility must be ruled out in order for the hypothesis to be plausible, and this answer choice does precisely that.
结论：在群体测验中飞走是因为收到了其他苍蝇释放的信号 削弱：不是因为收到信号，而是单纯跟着同伙一快飞

E receive support by sb用法错误，我们只能说receive support of sb/from sb
另外 DE的错误在于改变逻辑语义，因为DE用consistent修饰了support，而本来应该修饰receive的

C 整个结构不如E平行
Laos has a land area XXX but a population XXX
a land area that is about the same size as Great Britain's land area 这句话不对
you can say that two AREAS are the SAME.
you can also say that two pieces of LAND (or two COUNTRIES) have the same SIZE.
it's incorrect to say that two AREAS have the same SIZE.

E选项：adulthood身后少了逗号，插入语必须头尾用两个逗号将其隔开，例如：
James, a famous movie star, is friendly.
例句中，a famous movie star就是插入语，被两个逗号隔开。

AB: it is not clear what the modifying phrase depending on mass is supposed to modify. Because of its placement, it appears to modify red giant stage; it should, however, modify star. CE:the star itself passes through the red giant stage, not its mass.

前提：活动范围广的动物活得长
结论：活动范围广的动物种群数量会逐渐增多
gap：活得长的动物种群数量会逐渐增多

1/3....1 2^n是4的倍数

我在D和E之间纠结，最后选了E。有大神解释一下吗？

#转某位大神考友

d项
该选项的比较重心在动作上，而不是在speeds上，因此比较标志higher放在了介词短语at higher speeds里，而不是speeds的定语从句里，所以不能拿一个句子和that（speeds）相比，在d的基础上，可以有正确答案would enable customers to receive internet data over regular telephone lines at much higher speeds than the customer could do currently and possibly.

D选项中的 favored because ... 到底是个什么结构呢？
(E) because of enhancing reproduction or survival, but are
Though the structure is correct but not sure who is enhancing the "reproduction or survival"

先不说题，这个文章其实就说了一个字：天。。。

A survivor of the changes that swept the travel industry as a result of the deregulation of the airlines in 1978 — changes that included dramatic growth in the corporate demand for travel services, as well as extensive restructuring and consolidation within the travel industry - this agency adopted a unique structure for globalization.

这句话感觉是个病句？

when...不表原因，排除D和E。
B: having a prescription，拥有个处方
C: having too low of a dosage，拥有的剂量不够

for a squirrel to be said和a squirrel was said that ...都不对，排除BCE。say不能带双宾语。
D: 没有enough that...，排除
剩下A
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adjective] ENOUGH to..." means, basically, "sufficient to meet a threshold/minimum requirement".
"SO [adjective] that...", on the other hand, is used to emphasize that something is EXTREME.

twice as ... as ...，可以排除D和E，剩下ABC。
the national average是全国平均值，the average American是普通美国人，题目中主语是Americans of Middle Eastern descent，具有中东血统的美国人，人要跟人比较，所以只有B正确。

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E：we do not have "subject is likely that-clause" in english。
'the national average' would be exactly what it says: an average.
i.e., some kind of statistic.
'the national average' is not a person, so that option is nonsense.
Americans对比 the average American

A B:to last year不对，要用所有格。另外A里边experienced sales不对。
剩下CDE。
C: experienced xx percent不对。
E: 销量的多达50%的下降，语义不对；另外后面的从句不用will have，要用would have。
D: 多达50%的销量下降。

这题我觉得是我遇到的最难的，老师讲完我还没明白。

正常语序：the rate at which trees grow is believed to be among the surest indications of sunspot cycles.
AB: 主谓不一致，不能用are，要用is。
D: 没有谓语动词。
剩下C和E: C里边on Earth做状语修饰is believed动作，这动作发生在地球上；D里边on Earth做定语修饰indications，太阳黑子周期在地球上最确切的表现。作定语更合理。